package thread;

public class SyncDemo {
    public static void main(String[] args) {
        Table table=new Table();
        Thread t1=new Thread("甲"){
            public void run(){
                while(true) {
                    int bean = table.getBean();
                    Thread.yield();
                    System.out.println(getName() + ":" + bean);
                }
            }
        };

        Thread t2=new Thread("乙"){
            public void run(){
                while(true) {
                    int bean = table.getBean();
                    Thread.yield();
                    System.out.println(getName() + ":" + bean);
                }
            }
        };
        t1.start();
        t2.start();

    }
}

class Table{
    private int beans=20;

    public synchronized int getBean(){
        if(beans==0){
            throw new RuntimeException("没有豆子了");
        }

        Thread.yield();//让运行该方法的线程主动放弃剩余时间片

        return beans--;
    }
}